Didn't need 534 words of backstory, the post title was enough. Take the job; presumably with your math background you will quickly outgrow it after 1-2 years,

Didn't need 534 words of backstory, the post title was enough. Take the job; presumably with your math background you will quickly outgrow it after 1-2 years, and you'll get promoted or move on. A master is merely a convenient filter for employers -- what you'd learn there you'd never use in a non-research role.